Speckle elimination method and laser display system

By acquiring and processing images of the projection area in a laser display system, extracting noise maps and adding noise processing, the problem of needing to change the screen or optical structure in existing technologies is solved, and speckle effects are suppressed without increasing hardware costs.

CN122002013APending Publication Date: 2026-05-08CHENGDU XGIMI TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHENGDU XGIMI TECH CO LTD
Filing Date
2024-11-08
Publication Date
2026-05-08

AI Technical Summary

Technical Problem

Existing technologies require changes or customization of the screen and optical structure to eliminate laser speckle, increasing hardware costs and making them unsuitable for scenarios where hardware cannot be modified.

Method used

By acquiring the projection area image in the laser display system, performing transformation processing to extract the noise map, and adding noise processing to the output image, the effect of speckle is suppressed without changing the screen or optical structure.

Benefits of technology

It effectively suppresses or weakens speckle effects, reduces costs, and is suitable for existing hardware conditions, especially laser projection systems that support air gesture operation.

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Abstract

The invention discloses a speckle elimination method and a laser display system, and belongs to the field of laser display. In order to reduce the influence of speckles, a feature map and a white map in a projection area are shot through a camera, the feature map is used for establishing projection area extraction information to facilitate subsequent extraction of the projection area in an image shot by the camera, and the white map is used for extracting a noise map according to distribution characteristics of pixel values of a local area; and then, according to the noise map and the connected region, judging whether to perform noise adding operation on an output image of the laser display system so as to achieve the purpose of suppressing speckles. According to the invention, the influence of laser speckles on the visual imaging effect can be improved without changing a curtain or an optical structure.
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Citation Information

Patent Citations

  • Anti-laser speckle projection curtain surface structure and preparation method thereof

    CN114075793A

  • Laser speckle processing apparatus and laser projector

    CN208506389U